chapter 08 - qualitative and quantitative sampling - 7e (1)
DESCRIPTION
Qualitative and Quantitative SamplingTRANSCRIPT
Copyright ©2011 by Pearson Education, Inc.All rights reserved.
Chapter 8: Qualitative and Quantitative
Sampling
Social Research MethodsMAN-10
Erlan Bakiev, Ph. D
Copyright ©2011 by Pearson Education, Inc.All rights reserved.
Reasons for Sampling
• Sample
• Population
Copyright ©2011 by Pearson Education, Inc.All rights reserved.
Representative Sampling
Copyright ©2011 by Pearson Education, Inc.All rights reserved.
Nonprobability Sampling
• Convenience sampling
• Quota sampling
• Purposive sampling
Copyright ©2011 by Pearson Education, Inc.All rights reserved.
Probability SamplingLanguage of Probability Sampling
• Sampling element
• Population
• Target population
• Sampling frame
• Sampling ratio
Copyright ©2011 by Pearson Education, Inc.All rights reserved.
Probability Sampling
• Parameter
• Statistic
Copyright ©2011 by Pearson Education, Inc.All rights reserved.
Probability Sampling
• Random sample• Sampling error
• Five Ways to Sample Randomly
Copyright ©2011 by Pearson Education, Inc.All rights reserved.
Probability Sampling
• Simple random sample– Random-number table
– Sampling distribution
– Central limit theorem (CLT)
– Confidential interval
Copyright ©2011 by Pearson Education, Inc.All rights reserved.
Probability Sampling
• Systematic sampling– Sampling interval
Copyright ©2011 by Pearson Education, Inc.All rights reserved.
Probability Sampling• Stratified sampling
Copyright ©2011 by Pearson Education, Inc.All rights reserved.
Probability Sampling
• Cluster sampling– Within-household sampling
– Probability proportionate to size (PPS)
• Random-digit dialing (RDD)
Copyright ©2011 by Pearson Education, Inc.All rights reserved.
How large should a sample be?
Copyright ©2011 by Pearson Education, Inc.All rights reserved.
Drawing Inferences
Copyright ©2011 by Pearson Education, Inc.All rights reserved.
Goal is NOT a Representative Sample
Copyright ©2011 by Pearson Education, Inc.All rights reserved.
Nonprobability Sampling
• Purposive sampling
• Snowball sample
• Deviant case sampling
• Sequential sampling
• Theoretical sampling
Snowball sampling
Copyright ©2011 by Pearson Education, Inc.All rights reserved.
• Adaptive Sampling
• Hidden populations